The highest day temperature in September 2023 was 82°F. The lowest night temperature was 54°F. The average values for day and night temperatures during September were 72.2°F и 62.2°F respectivly.

The average sea surface temperature in September 2023 for Portonovo was 67.0°F. The maximum and minimum values were 64.6°F and 69.2°F respectively.

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation total in September for Portonovo is 1.2 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 6.0 mph. It makes September the most windless month of the year for Portonovo.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Portonovo in September is 7.7 hours.